From: Darrick J. Wong <djwong@kernel.org>
Date: Thu, 24 Apr 2025 21:44:25 +0000 (-0700)
Subject: fuse2fs: disable renameat2
X-Git-Tag: archive/debian/1.47.2-2~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=cb8fde1619e78b41894431d8e992d0230028b9e5;p=thirdparty%2Fe2fsprogs.git

fuse2fs: disable renameat2

Apparently fuse munged rename and renameat2 together into the same
upcall, so we actually have to filter out nonzero flags because
otherwise we do a regular rename for a RENAME_EXCHANGE/WHITEOUT, which
is not what the user asked for.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Link: https://lore.kernel.org/r/174553065177.1160461.684615549721279410.stgit@frogsfrogsfrogs
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
(cherry picked from commit b431abbc8fe0fd1de4e414aae3520c4c19411048)
---

diff --git a/misc/fuse2fs.c b/misc/fuse2fs.c
index d123eebb..36e1173e 100644
--- a/misc/fuse2fs.c
+++ b/misc/fuse2fs.c
@@ -1405,6 +1405,12 @@ static int op_rename(const char *from, const char *to
 	struct update_dotdot ud;
 	int ret = 0;
 
+#if FUSE_VERSION >= FUSE_MAKE_VERSION(3, 0)
+	/* renameat2 is not supported */
+	if (flags)
+		return -ENOSYS;
+#endif
+
 	FUSE2FS_CHECK_CONTEXT(ff);
 	fs = ff->fs;
 	dbg_printf("%s: renaming %s to %s\n", __func__, from, to);